Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef99cc75371295f0…

MALICIOUS

PDF

45.6 KB Created: 2020-08-05 04:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff538d6636e3c820f43037f855f2cdf1 SHA-1: c26faeda3334be44f2aeda0a30afc7dadd75759d SHA-256: ef99cc75371295f09197b8d6ed615c426f0ed841142ca844779768d0fb018c85
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is presented with a keyword suggesting a utility for merging PDF files. This indicates a social engineering attempt to trick users into clicking the link. No scripts were extracted from this sample.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=fusionner+plusieurs+documents+pdf+mac
    • http://files.woodskyscrapers.org/uploads/1/3/1/1/131164231/ecbbd0ae3890.pdf
    • http://files.mailin1.farmarik.com/uploads/1/3/0/7/130740138/91e25.pdf
    • http://files.thepetrospective.com/uploads/1/3/1/6/131607467/tosewizomotu-gijobibusix.pdf
    • http://buwanurip.delannoylab.com/uploads/1/3/0/9/130969465/rezofivaselofiluwoli.pdf
    • https://cdn.shopify.com/s/files/1/0432/5661/0979/files/72397171300.pdf
    • https://cdn.shopify.com/s/files/1/0436/7699/1653/files/watch_shameless_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/3452/5347/files/zimetari.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/77160317291.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/43355992932.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/togiwamodukopazave.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/jewasijib.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1097/files/walagonuzomok.pdf
    • https://cdn.shopify.com/s/files/1/0438/4522/2557/files/psychology_henry_gleitman_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/9486/6088/files/tujisezuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/2992/8872/files/pengaruh_budaya_hedonisme.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/bright_futures_adolescent.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007084.bin
061d643aef5d39be720e4a7b2a850b271622777d99b7b64e3feb99f5a96b9527		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7084 5256 bytes
font_01_sfnt_off00008252.bin
ca82856ea754c6227495e72b889c5127d3a7cac95448f01187d46d8693f2129a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8252 11928 bytes

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